TW201702477A - Combining structure of cylinder head and cylinder head cover capable of achieving excellent positioning by two-point positioning and effectively saving manufacturing cost - Google Patents

Abstract

The present invention relates to a combining structure of cylinder head and cylinder head cover, which comprises a cylinder head, a cylinder head cover, and a positioning member. The cylinder head comprises a camshaft support bracket and a positioning and combining hole. The camshaft support bracket comprises a stop unit. The cylinder head cover comprises a positioning and assembling hole, and a position-limiting unit. The position-limiting unit is integrally disposed on an inner side of the cylinder head cover and abuts the stop unit of the camshaft support bracket. Two ends of the positioning member are extended into the positioning and combining hole and the positioning and assembling hole and this, in combination with the position-limiting unit abutting the camshaft support bracket, form a positioned state of two-point positioning, so as to provide excellent positioning characteristics, and the position-limiting unit and the cylinder head cover are formed integrally as a whole to effectively save the manufacturing cost and to be easily assembled.

Description

Cylinder head and cylinder head cover combined structure

The present invention is a combination construction, especially a combination structure capable of effectively positioning a cylinder head and a cylinder head cover.

The existing cylinder includes a cylinder head and a cylinder head cover that is closed to the cylinder head. The cylinder head and the cylinder head cover must be tightly assembled during assembly to avoid leakage. The existing positioning technology is to provide a positioning on the cylinder head. a positioning member is inserted into the positioning coupling hole, and a positioning assembly hole corresponding to the positioning coupling hole and a cam assembly portion corresponding to the cam assembly hole, the cylinder head When the head and the cylinder head cover are assembled, the positioning member protrudes into the positioning coupling hole and the positioning combination hole to form a positioning, and the cam assembly portion abuts against the cam assembly hole, so that the cylinder head and the cylinder head cover are not assembled It can slide to avoid leakage. However, the cam assembly hole and the cam assembly are difficult to process during machining, so that the machining cost of the cylinder head and the cylinder head cover is high.

Because the cost required by the above technology is too high, a positioning joint hole is further disposed in the cylinder head, and a positioning member is inserted into the positioning joint hole, and the cylinder head cover is provided with a positioning combined hole corresponding to the positioning joint hole. The cam assembly hole and the cam assembly portion are omitted. When the cylinder head and the cylinder head cover are assembled, the positioning member protrudes into the positioning joint hole and the positioning combined hole to form a positioning. Since only one position is located, the cylinder may be caused. The degree of freedom between the head and the cylinder head cover becomes large, and the positioning is poor and there is a leak.

However, if two positioning joint holes are disposed in the cylinder head, and a positioning member is respectively inserted into the positioning joint holes, and the cylinder head cover is provided with two positioning combined holes, the two positioning combined holes respectively correspond to the positioning joint holes. The positioning coupling holes and the positioning combination holes can be positioned by the positioning members, so that the cylinder head and the cylinder head cover can be tightly assembled during assembly, but the distance between the positioning coupling holes must be combined with the positioning positions. The distance between the holes is equal, so that the processing precision of the positioning bonding holes and the positioning combination holes must be increased, and the processing cost is increased.

The main object of the present invention is to provide a combination of a cylinder head and a cylinder head cover, thereby reducing the problem that the positioning structure for positioning the cylinder head and the cylinder head cover in the existing cylinder is difficult to process and the processing cost is high.

In order to achieve the foregoing, the combination of the cylinder head and the cylinder head cover of the present invention comprises: a cylinder head including a body, a camshaft support base, a joint surface and a positioning joint hole, wherein the cam support base is disposed on the cylinder head The camshaft support base is provided with a stop unit, and the stop unit is integrally formed with the camshaft support base. The stop unit is disposed on a side of the camshaft support seat, and the joint surface is disposed on the a body is disposed around the camshaft support, the positioning coupling hole is disposed on the body and located on the joint surface; a cylinder head cover is attached to the cylinder head, the cylinder head cover includes a cover body, a combined surface, and a Positioning the combined hole and a limiting unit, the combined surface is disposed on the cover body and faces and cooperates with the joint surface of the cylinder head, the positioning combined hole is disposed on the cover body and located on the combined surface, and the positioning combination The hole is matched with the positioning joint hole, the limiting unit is located on the inner side surface of the cover body, the limiting unit is integrally formed with the cover body, and the limiting unit is matched with the clearance of the camshaft support seat Stop order ; And a positioning member, which is disposed between the cylinder line head and the cylinder head cover, the positioning member are inserted into opposite ends of the engaging hole and the positioning hole of the positioning composition.

When the cylinder head and the cylinder head cover are assembled, the positioning coupling hole and the positioning combination hole can be positioned by the positioning member, and the limiting unit of the cylinder head cover can be abutted against the stop unit of the camshaft support seat, Forming two positions to achieve an excellent positioning effect, and the cylinder head cover can be rotated without being assembled, wherein the limit unit is integrally formed on the cylinder head cover, and the limit is The setting of the bit unit does not require high-precision machining, so the setting of the limit unit has the advantages of easy processing and cost saving.

Referring to FIG. 1, a preferred embodiment of a combination of a cylinder head and a cylinder head cover according to the present invention includes a cylinder head 10, a cylinder head cover 20 and a positioning member.

As shown in FIG. 2 , the cylinder head 10 includes a body 11 , a camshaft support 12 , a joint surface 13 , and a positioning coupling hole 14 . The cam support 12 is disposed on the body 11 , and the camshaft supports The base 12 is provided with a stop unit 15 , and the stop unit 15 is integrally formed with the camshaft support base 12 . The stop unit 15 is disposed on a side of the camshaft support 12 , and the joint surface 13 is disposed on the The body 11 surrounds the camshaft support base 12, and the positioning coupling hole 14 is disposed on the body 11 and located on the joint surface 13.

As shown in FIG. 3 , the cylinder head cover 20 is covered by the cylinder head 10 , and the cylinder head cover 20 includes a cover body 21 , a combined surface 22 , a positioning combined hole 23 , and a limiting unit 24 . The cover shaft 22 of the cylinder head 10 is disposed on the cover body 21 and faces the mating surface 13 of the cylinder head 10 . The positioning assembly hole 23 is disposed on the cover body 21 . The positioning unit 22 is disposed on the inner surface of the cover body 21, and the limiting unit 24 is disposed on the inner side surface of the cover body 21, and the limiting position is provided on the inner side of the cover body 21, as shown in FIG. 4 and FIG. The unit 24 is integrally formed with the cover 21 , and the limiting unit 24 abuts against the stop unit 15 of the camshaft support 12 .

The positioning member is disposed between the cylinder head 10 and the cylinder head cover 20, and the two ends of the positioning member are respectively inserted into the positioning coupling hole 14 and the positioning combined hole 23.

As shown in FIG. 5 to FIG. 8 , the limiting unit 24 has two abutting surfaces 30 , and the abutting surfaces 30 respectively abut the stop unit 15 of the camshaft support 12 , and the abutting surface 30 . The extension intersection forms an angle θ which is located in the direction of the two abutment faces 30 toward the camshaft support 12, the angle of the angle θ being less than 180°.

The stop unit 15 can form at least one stop recess 151 on the camshaft support base 12. As shown in FIG. 18, the bottom end of the stop recess 151 forms a plane 31, and the plane 31 and the cylinder head 10 The binding surface 13 is located on the same reference surface, and the limiting unit 24 can form at least one limiting rib 241 on the cover body 21, and the limiting rib 241 of the cover body 21 fits against the camshaft support seat with a clearance fit. The stop recess 151 of 12 is stopped.

The limiting unit 24 can form at least one limiting rib 241 on the cover body 21, and as shown in FIG. 5, the shape of the stop unit 15 of the camshaft support base 12 is unchanged, and the limit of the cover body 21 is The rib 241 fits snugly against the stop unit 15 of the camshaft support 12 .

The stop unit 15 can form at least one stop rib 152 on the camshaft support base 12, and as shown in FIG. 7, the shape of the limit unit 24 of the cover body 21 is unchanged, and the limit of the cover body 21 is The unit 24 mates against the stop rib 152 of the camshaft support 12 with clearance.

The stop unit 15 can form at least one stop rib 152 on the camshaft support base 12. The retaining unit 24 can form at least one limit recess 242 on the cover body 21, and the limit recess 242 of the cover body 21 The gap rib 152 of the camshaft support seat 12 abuts against the gap.

As shown in FIG. 5 , FIG. 6 and FIG. 10 , the limiting unit 24 includes two limiting ribs 241 , and the abutting surfaces 30 are respectively located on the limiting ribs 241 and abuts the camshaft support 12 . As shown in FIG. 6, the stop unit 15 of the camshaft support 12 includes two stop recesses 151, and the stop recesses 151 cooperate with the limit ribs 241, the limit The ribs 241 are respectively abutted against the recesses 151 by the abutting surfaces 30. As shown in FIG. 12, the stop unit 15 can form a stop recess 151 on the camshaft support 12, the limiting unit The second limiting rib 241 is formed on the cover body 21, and the limiting rib 241 abuts against the stopping recess 151 and the stopping unit 15 with a clearance fit.

As shown in FIG. 7 to FIG. 9 , the stop unit 15 of the camshaft support 12 includes two stop ribs 152 , and the limiting unit 24 of the cover 21 abuts against the stops respectively. The ribs 152, as shown in FIG. 8, the limiting unit 24 includes two limiting recesses 242, and the limiting recesses 242 cooperate with the stopping ribs 152, and the abutting faces 30 are respectively located at the limiting positions The recess 242 abuts against the stop rib 152, wherein the two stop ribs 152 are respectively located on the outer periphery of the connecting portion 121 and the side of one of the columnar portions 122, as shown in FIG. The retaining unit 15 can form a second stop rib 152 on the camshaft support base 12, and the limiting unit 24 forms a limiting recess 242 in the cover body 21, and the limiting recess 242 is matched against the one of the retaining recesses 242. The rib 152 is abutting against the other stop rib 152 with a clearance fit.

As shown in FIG. 11 , the limiting unit 24 forms a limiting rib 241 and a limiting plane 243 on the cover body 21 , and the limiting rib 241 and the limiting plane 243 are respectively matched against the gap. The stop unit 15 of the camshaft support base 12, as shown in FIG. 13, the stop unit 15 can form a stop rib 152 on the camshaft support base 12, and the limit unit 24 can be disposed on the cover body 21 A limiting recess 242 and a limiting plane 243 are formed. The limiting recess 242 abuts against the stopping rib 152 , and the limiting plane 243 abuts against the stopping unit 15 .

As shown in FIG. 14 , the stop unit 15 can form a stop rib 152 on the camshaft support 12 , and the limiting unit 24 can form a limiting plane 243 on the cover 21 . The clearance fits against the stop rib 152 , the stop plane 243 abuts against the stop unit 15 .

In addition, as shown in FIG. 15 , the stop unit 15 can form a stop recess 151 on the camshaft support base 12 , and the limiting unit 24 can form a limiting rib 241 and a limiting plane on the cover 21 . 243, the limiting rib 241 of the cover 21 abuts against the stop recess 151 of the camshaft support 12, and the limiting plane 243 of the cover 21 abuts against the camshaft with a clearance fit The stop unit 15 of the support base 12.

As shown in FIG. 16 , the stop unit 15 can form a stop recess 151 on the camshaft support base 12 , and the limiting unit 24 forms a second limiting plane 243 on the cover 21 , and one of the cover bodies 21 is limited thereto. The positional plane 243 is abutting against the stop recess 151 of the camshaft support 12 , and the other limiting plane 243 of the cover 21 is abutted against the stop of the camshaft support 12 . 15.

As shown in FIG. 17 , the stop unit 15 forms a second stop recess 151 on the camshaft support 12 , and the limiting unit 24 forms a second limiting plane 243 on the cover 21 , and the limit of the cover 21 . The bit planes 243 are cooperatively abutted against the stop recesses 151 of the camshaft support 12, respectively.

In addition, as shown in FIG. 1, the cylinder head 10 and the cylinder head cover 20 have an axis L, the direction parallel to the axis L is an axial direction, and the direction perpendicular to the axis L is a radial direction, as shown in FIG. 3 to FIG. It is shown that the normal directions of the abutting faces 30 are radial directions.

As shown in FIG. 2 and FIG. 4 , the positioning and assembling hole 23 of the cylinder head cover 20 is engaged with the positioning and engaging hole 14 of the cylinder head 10 , and the two ends of the positioning member are respectively inserted into the positioning and engaging hole 14 and the positioning combined hole. 23, a position is formed to position the cylinder head cover 20 in the cylinder head 10. Referring to FIG. 5, when the cylinder head cover 20 is assembled to the cylinder head 10, the cylinder head cover 20 is limited. The unit 24 will abut against the stop unit 15 of the camshaft support 12 and also form a position, and the cylinder head cover 20 will not rotate when assembled to the cylinder head 10.

In summary, since the limiting unit 24 is integrally formed with the cover 21, and the stop unit 15 is integrally formed with the camshaft support 12, it can be generated at the time of production without additional The processing is relatively low in processing cost, and has the advantages of being easy to process and cost-saving. In addition, the positioning coupling hole 14 , the positioning combined hole 23 and the positioning member are used together with the limiting unit 24 to abut against the stopping unit 15 . The two positioning positions are formed, and the cylinder head cover 20 can be effectively positioned on the cylinder head 10, which has the advantages of easy assembly and good positioning effect.

10‧‧‧Cylinder head
11‧‧‧Ontology
12‧‧‧Camshaft support
121‧‧‧Connecting Department
122‧‧‧ Column
13‧‧‧ joint surface
14‧‧‧ Positioning joint hole
15‧‧‧stop unit
151‧‧‧stop recess
152‧‧‧stop ribs
20‧‧‧Cylinder head cover
21‧‧‧ cover
22‧‧‧ combination face
23‧‧‧ Positioning combination hole
24‧‧‧Limited unit
241‧‧‧Limited ribs
242‧‧‧Limited recess
243‧‧‧Limited plane
30‧‧‧Abutment
31‧‧‧ plane
L‧‧‧ axis θ‧‧‧ angle

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side elevation plan view showing a first preferred embodiment of the combination of a cylinder head and a cylinder head cover of the present invention. 2 is a top plan view showing the cylinder head of the first preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. 3 is a bottom plan view of the cylinder head cover of the first preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 4 is a top plan view of the A-A section line of Figure 1. Fig. 5 is a partially enlarged plan view showing the top view of Fig. 4. Figure 6 is a partially enlarged schematic view showing a second preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 7 is a partially enlarged schematic view showing a third preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 8 is a partially enlarged schematic view showing a fourth preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 9 is a partially enlarged schematic view showing a fifth preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 10 is a top plan view showing a sixth preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 11 is a top plan view showing a seventh preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 12 is a top plan view showing an eighth preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 13 is a top plan view showing a ninth preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 14 is a top plan view showing a tenth preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 15 is a top plan view showing the eleventh preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 16 is a top plan view showing a twelfth preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 17 is a top plan view showing a thirteenth preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention. Figure 18 is a side elevational, partial cross-sectional view showing a second preferred embodiment of the combination of the cylinder head and the cylinder head cover of the present invention.

10‧‧‧Cylinder head

11‧‧‧Ontology

12‧‧‧Camshaft support

121‧‧‧Connecting Department

122‧‧‧ Column

15‧‧‧stop unit

20‧‧‧Cylinder head cover

21‧‧‧ cover

23‧‧‧ Positioning combination hole

24‧‧‧Limited unit

241‧‧‧Limited ribs

30‧‧‧Abutment

Claims (19)

A combination of a cylinder head and a cylinder head cover, comprising: a cylinder head comprising a body, a camshaft support base, a joint surface and a positioning joint hole, the cam support base being disposed on the body, the camshaft The support base is provided with a stop unit, and the stop unit is integrally formed with the camshaft support seat, the stop unit is disposed on a side of the camshaft support seat, and the joint surface is disposed on the body and surrounds the cam a shaft support seat, the positioning joint hole is disposed on the joint surface and located on the joint surface; a cylinder head cover is attached to the cylinder head, the cylinder head cover comprises a cover body, a combined surface, a positioning combined hole and a a positioning unit, the combined surface is disposed on the cover body and faces and cooperates with the joint surface of the cylinder head, the positioning assembly hole is disposed on the cover body and located on the combined surface, and the positioning combined hole cooperates with the positioning combination a hole, the limiting unit is located on an inner side of the cover body, the limiting unit is integrally formed with the cover body, and the limiting unit abuts against the stop unit of the camshaft support seat; and a positioning component, Its system is set at Between the cylinder head and the cylinder head cover, the positioning member are inserted into opposite ends of the engaging hole and the positioning hole of the positioning composition. The combination of the cylinder head and the cylinder head cover according to claim 1, wherein the limiting unit has two abutting surfaces, the abutting surfaces respectively abut the stopping unit of the camshaft supporting seat, and the abutting surface The extension intersection forms an angle θ which is located in the direction of the two abutment faces toward the camshaft support, the angle of the angle being less than 180°. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms at least one stop recess in the camshaft support seat, and the limiting unit forms at least one limiting rib on the cover body, the cover body The limiting ribs are cooperatively abutted against the stop recesses of the camshaft support. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the limiting unit forms at least one limiting rib on the cover body, and the limiting rib of the cover body is cooperatively supported against the camshaft Block stop unit. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms at least one stop rib on the camshaft support, and the retaining unit of the cover abuts against the camshaft with clearance The stop rib of the support base. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms at least one stop rib on the camshaft support seat, and the limiting unit forms at least one limiting recess in the cover body, the cover body The limiting recess is abutting against the stop rib of the camshaft support. The combination of the cylinder head and the cylinder head cover according to claim 3, wherein the stop unit forms a second stop recess in the camshaft support seat, the limiting unit forms a second limiting rib on the cover body, and the cover body The limiting rib is abutting against the stop recess of the camshaft support. The combination of the cylinder head and the cylinder head cover according to claim 4, wherein the limiting unit forms a second limiting rib on the cover body, and the limiting rib of the cover body fits against the camshaft support seat with a clearance fit Stop unit. The combination of the cylinder head and the cylinder head cover according to claim 5, wherein the stop unit forms two stop ribs on the camshaft support seat, and the retaining unit of the cover body is cooperatively supported against the camshaft The stop rib of the seat. The combination of the cylinder head and the cylinder head cover according to claim 6, wherein the stop unit forms two stop ribs on the camshaft support seat, and the limiting unit forms a second limiting recess in the cover body, and the cover body The limiting recess is abutting against the stop rib of the camshaft support. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms a stop recess in the camshaft support seat, and the limiting unit forms a second limiting rib on the cover body, and the cover body is limited The ribs abut against the stop recess of the camshaft support and the stop unit, respectively. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms two stop ribs on the camshaft support seat, and the limiting unit forms a limiting recess in the cover body, and the cover body is limited The recessed portion of the cover rests against the one of the stop ribs of the camshaft support. The retaining unit of the cover abuts against the other stop rib of the camshaft support. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the limiting unit forms a limiting rib and a limiting plane on the cover body, and the limiting rib and the limiting plane of the cover respectively respectively The clearance fits snugly against the stop unit of the camshaft support. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms a stop rib on the camshaft support seat, and the limiting unit forms a limiting recess and a limit on the cover body. a limiting recess of the cover body with a clearance fit against the stop rib of the camshaft support seat, the limiting plane of the cover body fits against the stop unit of the camshaft support seat . The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms a stop rib on the camshaft support seat, and the limiting unit forms a limiting plane on the cover body, the cover body The limiting unit is matched against the stop rib of the camshaft support seat, and the limiting plane is matched against the stop unit of the camshaft support. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms a stop recess in the camshaft support seat, and the limiting unit forms a limiting rib and a limiting plane on the cover body. The limiting rib of the cover body fits snugly against the stop recess of the camshaft support seat, and the limiting plane of the cover body fits against the stop unit of the camshaft support seat. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms a stop recess in the camshaft support seat, and the limiting unit forms a second limiting plane on the cover body, and the cover body One of the limiting planes has a clearance against the stop recess of the camshaft support. The other limiting plane of the cover cooperates with the stop of the camshaft support. The combination of the cylinder head and the cylinder head cover according to claim 2, wherein the stop unit forms a second stop recess in the camshaft support seat, and the limiting unit forms a second limiting plane on the cover body, and the cover body The limiting planes are respectively matched against the stop recesses of the camshaft support seat. The cylinder head and the cylinder head cover according to 7, 11 or 16, wherein the bottom end of the stop recess forms a plane which is located on the same reference plane as the joint surface of the cylinder head.